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A reaction takes place in three steps. The rate constants are k1,k2 and k3. The overall rate constant k=k1k3k2. If (energy of activation) E1,E2 and E3 are 60, 30 and 10 kJ. The overall energy of activation is :

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a

40

b

30

c

400

d

60

answer is A.

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Detailed Solution

K=Ae−Ea/RT ∴ Ae−Ea/RT=Ae-E1-E3+E2RTEa=E1+E3−E2=60+10−30=40 kJ

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A reaction takes place in three steps. The rate constants are k1,k2 and k3. The overall rate constant k=k1k3k2. If (energy of activation) E1,E2 and E3 are 60, 30 and 10 kJ. The overall energy of activation is :